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-rw-r--r--mm/numa.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/mm/numa.c b/mm/numa.c
new file mode 100644
index 000000000000..e2eec07707d1
--- /dev/null
+++ b/mm/numa.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/memblock.h>
+#include <linux/printk.h>
+#include <linux/numa.h>
+#include <linux/numa_memblks.h>
+
+struct pglist_data *node_data[MAX_NUMNODES];
+EXPORT_SYMBOL(node_data);
+
+/* Allocate NODE_DATA for a node on the local memory */
+void __init alloc_node_data(int nid)
+{
+ const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
+ u64 nd_pa;
+ void *nd;
+ int tnid;
+
+ /* Allocate node data. Try node-local memory and then any node. */
+ nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+ if (!nd_pa)
+ panic("Cannot allocate %zu bytes for node %d data\n",
+ nd_size, nid);
+ nd = __va(nd_pa);
+
+ /* report and initialize */
+ pr_info("NODE_DATA(%d) allocated [mem %#010Lx-%#010Lx]\n", nid,
+ nd_pa, nd_pa + nd_size - 1);
+ tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
+ if (tnid != nid)
+ pr_info(" NODE_DATA(%d) on node %d\n", nid, tnid);
+
+ node_data[nid] = nd;
+ memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
+}
+
+void __init alloc_offline_node_data(int nid)
+{
+ pg_data_t *pgdat;
+
+ pgdat = memblock_alloc(sizeof(*pgdat), SMP_CACHE_BYTES);
+ if (!pgdat)
+ panic("Cannot allocate %zuB for node %d.\n",
+ sizeof(*pgdat), nid);
+
+ node_data[nid] = pgdat;
+}
+
+/* Stub functions: */
+
+#ifndef memory_add_physaddr_to_nid
+int memory_add_physaddr_to_nid(u64 start)
+{
+ pr_info_once("Unknown online node for memory at 0x%llx, assuming node 0\n",
+ start);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
+#endif
+
+#ifndef phys_to_target_node
+int phys_to_target_node(u64 start)
+{
+ pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",
+ start);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(phys_to_target_node);
+#endif